检索结果-南通市图书馆

Ecological Security Evaluation Algorithm for Resource-Exhausted Cities Based on the PSR Model

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第10期69卷 985-1001页

作者： Xiaozhou Li zhenggang xu Yuanyuan Fu Qi Jin Yunlin Zhao Neal NXiong Key Laboratory of Forestry Remote Sensing Based Big Data&Ecological Security for Hunan Province Central South University of Forestry and TechnologyChangsha410004China Hunan Urban and Rural Ecological Planning and Restoration Engineering Research Center Hunan City UniversityYiyang413000China College of Information and Electronic Engineering Hunan City UniversityYiyang413000China Department of Mathematics and Computer Science Northeastern State UniversityTahlequah74464USA

Today,resource depletion threatens a number of resource-based cities in *** ecological security problem caused by the long-term exploitation of natural resources is a key issue to be solved in the development of resource-exhausted *** 23 indicators,this study evaluated the ecological security status and development trends of 21 resource-exhausted cities in China from 2011 to *** results showed that from 2011 to 2015,the overall ecological security of this type of city was low,with over 60%of the cities at an unsafe ***,ecological security improved rapidly after 2016,and by 2017,all of the cities had reached the critical safety *** top 10 indicators of ecological security included industrial sulfur dioxide emissions,water supply,agricultural fertilizer application,and forest *** 10 indicators’cumulative contribution to ecological security was 48.3%;among them,reducing industrial sulfur dioxide emissions contributed the most at 5.7%.These findings can help governments better understand the ecological security status of resource-exhausted cities,and it can provide a reference for the allocation of funds and other resources to improve the ecological safety of these cities.

关键词： Ecological security PSR model evaluation resource-exhausted cities

The chloroplast genome comparative characteristic of artificial breeding tree,a case about Broussonetia kazinoki×Broussonetia papyrifera

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

BIOCELL 2022年第3期46卷 803-819页

作者： WAN ZHANG GUIYAN YANG YUNLIN ZHAO zhenggang xu HUANG HUIMIN JIAKANG ZHOU Hunan Research Center of Engineering Technology for Utilization of Environmental and Resources Plant Central South University of Forestry and TechnologyChangsha410004China Hunan Urban and Rural Ecological Planning and Restoration Engineering Research Center Hunan City UniversityYiyang413000China Key Laboratory of National Forestry and Grassland Administration on Management of Western Forest Bio-Disaster College of ForestryNorthwest A&F UniversityYangling712100China

Broussonetia kazinoki×Broussonetia papyrifera(ZJGS)is a hybrid species in Moraceae family,which has a very complicated hybrid *** excellent characteristics of fast growth,strong soil and water conservation ability,high leaf protein content and stem fiber content in ZJGS make it both ecological benefits in the mining area and economically *** study aims to further understand ZJGS and other Moraceae taxa through the ZJGS chloroplast(cp)genome structure and the comparison with 12 closely related Moraceae *** the 13 Moraceae species,the cp genome length of seven Broussonetia species(ranges from 160,239 bp to 162,594 bp)is larger than that of six Morus species(ranges from 158,459 bp to 159,265 bp).Among the 77 shared protein-coding genes(PCGs)in Moraceae species,the obvious positive selection of Ka/Ks ratios acted on petD and rpl16 genes of *** and ***,*** analysis based on shared PCGs from 28 species shows that ZJGS is closely related to maternal *** findings provide data support for the origin of ZJGS hybridization and provide genomic resources for future ZJGS resource development and molecular breeding.

关键词： Broussonetia kazinoki Broussonetia papyrifera Moraceae Phylogenetic relationship Maternal inheritance

水电站设备检修智能知识检索与推荐模型研究应用

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

水力发电 2024年第2期50卷 78-84页

作者：胡应春徐正刚王乐宁张思洪国能大渡河流域水电开发有限公司四川成都610000

为进一步提高标准化水电站设备检修作业效率,增强智慧企业标准化设备检修有效管理与知识传承能力,对标准化水电站设备检修智能平台技术需求进行分析,以搭建智能设备检修知识辅助平台为基础,设计了平台整体架构,提出了智能化关键技术解... 详细信息

为进一步提高标准化水电站设备检修作业效率,增强智慧企业标准化设备检修有效管理与知识传承能力,对标准化水电站设备检修智能平台技术需求进行分析,以搭建智能设备检修知识辅助平台为基础,设计了平台整体架构,提出了智能化关键技术解决方案,并完成了水电站设备检修中知识管理、检索技术和推荐技术等,克服了传统水电站设备检修中知识无法沉淀的问题。该技术方案已成功推广并应用于大岗山水电站标准化设备检修中,有效满足了水电设备检修管理需求并提高了生产效率,取得了较大的经济社会效益。

关键词：标准化设备检修知识管理检索推荐语义表示注意力机制

Insight into the characteristics of an important evolutionary model bird(Geospiza magnirostris)mitochondrial genome through comparison

在线全文

学校读者我要写书评

暂无评论

BIOCELL 2022年第7期46卷 1733-1746页

作者： zhenggang xu LIANG WU JIAHAO CHEN YUNLIN ZHAO CHONGxuAN HAN TIAN HUANG GUIYAN YANG Key Laboratory of National Forestry and Grassland Administration on Management of Western Forest Bio-Disaster College of ForestryNorthwest A&F UniversityYangling712100China Engineering Research Center for Internet of Animals Changsha410000China Key Laboratory of Forestry Remote Sensing Based Big Data&Ecological Security for Hunan Province Central South University of Forestry and TechnologyChangsha410004China

Darwin’s finches are the most classic case of *** studies on the evolution of this species were mainly based on *** now,the mitochondrial genome of Geospiza magnirostris has been sequenced and the study explored the characteristics of the complete genome of *** and verified the evolutionary position of *** 13 PCGs initiated by ATN *** stop codons of three PCGs(ND2,COX3 and ND4)were incomplete,with only T-or TA-replacing complete form TAA or *** the tRNA genes expressed a typical cloverleaf secondary structure,except for tRNA^(Ser1)(AGY),whose dihydrouridine(DHU)arm was lack and instead with a simple *** the sequence of the control region of ***,we found six simple repeat tandem sequences with a total length of 42 *** characteristic conserved overlapping junction(ATGCTAA)and(CAAGAAAG)were observed as reported for eight selected Passeriformes birds.A special conserved overlapping junction(ATCTTACC)involved in mitochondrial transcription termination was found between tRNA^(Tyr) and COX1 in ***’s control *** most frequently used amino acids in ***’s PCGs were Leu1(CUN),Ile,Thr,*** codon usage of *** was relatively average,and there was no particular *** ratio Ka/Ks results showed that *** receives less natural selection *** phylogenetic relationships and cluster analysis of relative codon usage showed that *** and Thraupis episcopus clustered in one *** phylogenetic position of *** was consistent with the traditional taxonomic of *** results supported the conclusion that *** belongs to the morphological classification of the family Thraupidae.

关键词： Geospiza magnirostris Mitochondrial genome Comparative analysis Evolution analysis Phylogenetic relationships

RP11-40C6.2 Inactivates Hippo Signaling by Attenuating YAP1 Ubiquitylation in Hepatitis B Virus-associated Hepatocellular Carcinoma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Clinical and Translational Hepatology 2023年第2期11卷 323-333页

作者： Han Zhuo Chen Wu Junwei Tang Feihong Zhang zhenggang xu Dongwei Sun Yue Teng Zhongming Tan Hepatobiliary Center The First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsuChina General Surgery The First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsuChina Department of Medical Oncology Jiangsu Cancer HospitalJiangsu Institute of Cancer ResearchThe Affiliated Cancer Hospital of Nanjing Medical UniversityNanjingJiangsuChina

Background and Aims:Chronic hepatitis caused by hepatitis B virus(HBV)infection is a leading cause of hepatocellular carcinoma(HCC).We investigated the roles of oncogenic HBV infection-associated long noncoding RNAs in ***:Bioinformatics analysis of data from the Cancer Genome Atlas(TCGA)was performed to screen potential oncogenic HBV-related ***,we assessed their expression in clinical samples and investigated their correlation with clinical *** detailed oncogenic effects were analyzed by performing in vitro and in vivo ***:RP11-40C6.2,an HBV infection-related lncRNA,was identified by analysis of the TCGA–Liver Hepatocellular Carcinoma *** Set Enrichment Analysis and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analysis of differentially expressed genes revealed a strong association of RP11-40C6.2 with the Hippo signaling ***11-40C6.2 was overexpressed in HCC patients with HBV infection compared to those without HBV ***11-40C6.2 transcription showed a positive association with HBV-X protein(HBx),but not HBV core protein(HBc)expression,both of which are carcinogenic *** gene reporter and ChIP assays revealed that YAP1/TAZ/TEADs complex enhanced RP11-40C6.2 transcription by binding to its promoter ***11-40C6.2 showed oncogenic characteristics in HCC cell lines and in animal models that were mediated via activation of *** vitro ubiquitylation assay revealed that RP11-40C6.2 can promote the stabilization of YAP1 by stopping phosphorylation at its s127 residue and further stopping its degradation through binding to ***:RP11-40C6.2 is an HBV infection-related lncRNA that exerts its oncogenic effects by targeting the Hippo signaling pathway.

关键词： Hepatocellular carcinoma Hippo signaling lncRNA YAP1 HBV

Annual migratory patterns of Far East Greylag Geese(Anser anser rubrirostris)revealed by GPS tracking

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrative Zoology 2020年第3期15卷 213-223页

作者： Xianghuang LI Xin WANG Lei FANG Nyambayar BATBAYAR Tseveenmyadag NATSAGDORJ Batmunkh DAVAASUREN Iderbat DAMBA zhenggang xu Lei CAO Anthony David FOX State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina School of Life Science University of Science and Technology of ChinaHefeiAnhuiChina Wildlife Science and Conservation Center of Mongolia UlaanbaatarMongolia Key Laboratory of Forestry Remote Sensing Based Big Data&Ecological Security for Hunan Province Central South University of Forestry and TechnologyChangshaChina Department of Bioscience Aarhus UniversityRøndeDenmark

Twenty Far East Greylag Geese,Anser anser rubrirostris,were captured and fitted with Global Positioning System/Global System for Mobile Communications(GPS/GSM)loggers to identify breeding and wintering areas,migration routes and stopover *** data for the first time showed linkages between their Yangtze River wintering areas,stopover sites in northeastern China,and breeding/molting grounds in eastern Mongolia and northeast China.10 of the 20 tagged individuals provided sufficient *** stopped on migration at the Yellow River Estuary,Beidagang Reservoir and Xar Moron River,confirming these areas as being important stopover sites for this *** median spring migration duration was 33.7 days(individuals started migrating between 25 February and 16 March and completed migrating from 1 to 9 April)compared to 52.7 days in autumn(26 September-13 October until 4 November-11 December).The median stopover duration was 31.1 and 51.3 days and the median speed of travel was 62.6 and 47.9 km/day for spring and autumn migration,re*** significant differences between spring and autumn migration on the migration duration,the stopover duration and the migration speed confirmed that tagged adult Greylag Geese traveled faster in spring than autumn,supporting the hypothesis that they should be more time-limited during spring migration.

关键词： Anser anser autumn migration greylag goose GPS/GSM loggers spring migration

Threshold of climate extremes that impact vegetation productivity over the Tibetan Plateau

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第6期67卷 1967-1977页

作者： zhenggang PIAO Xiangyi LI Hao xu Kai WANG Shuchang TANG Fei KAN Songbai HONG College of Urban and Environmental Sciences Peking UniversityBeijing 100871China

Vegetation growth is adversely impacted by multiple climate extremes related to the water and thermal stress over the Tibetan Plateau(TP).However,it remains unknown at which stress level these climate extremes can trigger the abrupt shifts of vegetation response to climate extremes and result in the maximum vegetation response across *** fill this knowledge gap,we combined the hydrometeorological data and the satellite-derived vegetation index to detect two critical thresholds that determine the response of vegetation productivity to droughts,high-temperature extremes,and low-temperature extremes,respectively,during *** results show that the response of vegetation productivity to droughts rapidly increases once crossing -1.41±0.6 standard deviation(σ)below the normal conditions of soil *** crossing-2.98σ±0.9σ,vegetation productivity is maximum damaged by ***-temperature extremes,which have the two thresholds of 1.34σ±0.4σand 2.31σ±0.4σover TP,are suggested to trigger the strong response of vegetation productivity at a milder stress level than low-temperature extremes(two thresholds:-1.44σ±0.5σand-2.53σ±0.8σ).Moreover,we found the compounded effects of soil moisture deficit in reducing the threshold values of both high-and low-temperature *** on the derived thresholds of climate extremes that impact vegetation productivity,Earth System Models project that southwestern TP and part of the northeastern TP will become the hotspots with a high exposure risk to climate extremes by *** study deciphers the high-impact extreme climates using two important thresholds across TP,which advances the understanding of the vegetation response to different climate extremes and provides a paradigm for assessing the impacts of climate extremes on regional ecosystems.

关键词： Tibetan Plateau Climate extremes Thresholds Vegetation productivity

Contrasting habitat use and conservation status of Chinese-wintering and other Eurasian Greater White-fronted Goose(Anser albifrons)populations

在线全文

学校读者我要写书评

暂无评论

Avian Research 2021年第4期12卷 600-611页

作者： xueqin Deng Qingshan Zhao Junjian Zhang Andrea Kölzsch Diana Solovyeva Inga Bysykatova-Harmey zhenggang xu Helmut Kruckenberg Lei Cao Anthony David Fox State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 101408China Department of Migration Max Planck Institute of Animal BehaviorRadolfzellGermany Institute for Wetlands and Waterbird Research E.V.(IWWR) Verden(Aller)Germany Institute of Biological Problems of the North MagadanRussia Institute of Biological Problems of Cryolitozone YakutskRussia Key Laboratory of National Forestry and Grassland Administration On Manage-ment of Western Forest Bio-Disaster College of ForestryNorthwest A&F Uni-versityYangling 712100China Department of Ecoscience Aarhus UniversityAarhusDenmark

Background:GPS/GSM tracking data were used to contrast use of(i)habitats and(ii)protected areas between three Arctic-nesting Greater White-fronted Geese(Anser albifrons,GWFG)populations throughout the annual *** wished to demonstrate that the East Asian Continental Population(which winters on natural wetlands in the Chinese Yangtze River floodplain and is currently declining)avoids using farmland at multiple wintering *** also gath-ered tracking evidence to support general observations from two increasing population of GWFG,the North Sea-Baltic(which winters in Europe)and the West Pacific(which winter in Korea and Japan)winter mostly within farmland landscapes,using wetlands only for safe night ***:We tracked 156 GWFG throughout their annual cycle using GPS/GSM transmitters from these three popu-lations to determine migration routes and stopover staging *** used Brownian Bridge Movement Models to generate summer,winter and migration stopover home ranges which we then overlaid in GIS with land cover and protected area boundary at national level to determine habitat use and degree of protection from nature conserva-tion designated ***:Data confirmed that 73%of European wintering GWFG homes ranges were from within farmland,com-pared to 59%in Japan and Korea,but just 5%in China,confirming the heavy winter use of agricultural landscapes by GWFG away from China,and avoidance of farmland at multiple sites within the Yangtze River *** same GWFG used farmland in northeast China in spring and autumn,confirming their experience of exploiting such habi-tats at other stages of their annual *** wintering birds showed the greatest overlap with protected areas of all three populations,showing current levels of site safeguard are failing to protect this ***:Results confirm the need for strategic planning to protect the East Asian Continental GWFG *** the site protection network in place to p

关键词： Farmland feeding Habitat use Migration National nature reserve Protected areas Staging areas

Building Feedback-Regulation System Through Atomic Design for Highly Active SO_(2)Sensing

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第7期16卷 343-357页

作者： Xin Jia Panzhe Qiao Xiaowu Wang Muyu Yan Yang Chen Bao-Li An Pengfei Hu Bo Lu Jing xu zhenggang xue Jiaqiang xu NEST Lab Department of ChemistryCollege of SciencesShanghai UniversityShanghai 200444People’s Republic of China Shanghai Synchrotron Radiation Facility Zhangjiang LabShanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204People’s Republic of China School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026People’s Republic of China Key Laboratory of Organic Compound Pollution Control Engineering(MOE) School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444People’s Republic of China Shanghai University Instrumental Analysis&Research Center of Shanghai UniversityShanghai 200444People’s Republic of China

Reasonably constructing an atomic interface is pronouncedly essential for surface-related gas-sensing ***,we present an ingen-ious feedback-regulation system by changing the interactional mode between single Pt atoms and adjacent S species for high-efficiency SO_(2)*** found that the single Pt sites on the MoS_(2)surface can induce easier volatiliza-tion of adjacent S species to activate the whole inert S ***,the activated S species can provide a feedback role in tailoring the antibonding-orbital electronic occupancy state of Pt atoms,thus creating a combined system involving S vacancy-assisted single Pt sites(Pt-Vs)to synergistically improve the adsorption ability of SO_(2)gas ***-more,in situ Raman,ex situ X-ray photoelectron spectroscopy testing and density functional theory analysis demonstrate the intact feedback-regulation system can expand the electron transfer path from single Pt sites to whole Pt-MoS_(2)supports in SO_(2)gas *** with wireless-sensing modules,the final Pt1-MoS_(2)-def sensors array can further realize real-time monitoring of SO_(2)levels and cloud-data storage for plant *** a fundamental understanding of the intrinsic link between atomic interface and sensing mechanism is thus expected to broaden the rational design of highly effective gas sensors.

关键词： Feedback-regulation system Atomic interface SO_(2)sensor Single-atom sensing mechanism Intelligent-sensing array